Get Invoice
Example JSON Response
{ invoiceid: "1000", id: "1000", linkid: "1000", customerid: "101", customername: "John Smith", failedreason: "", paymenttype: "none", subscriptionid: "", billdate: "06/14/2017", canbechargedtoday: 1, billpmtref: null, billrawpmtref: null, balancedue: null, amount: "$1.00 USD", simplebalancedue: "$1.00 USD", billappliesto: null, overdue: 1, billstatus: "not paid", statusenum: -2, error: false, success: true, message: "" }